To say that's 'all' we do is missing the point. It makes up a huge part of what we do. If that gap was filled with healing, then great.

But let's say hypothetically we still had TP and 30% of what DPS would do was TP management (or MP for casters) and the rest of what they did was spam 1 or 2 buttons, no matter how varied the skills are for managing their TP were, they'd still complain how boring DPS has gotten.